package com.sky.service.impl;

import java.time.LocalDateTime;
import java.util.List;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;

import lombok.extern.slf4j.Slf4j;

@Service
@Slf4j
public class ShppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 添加购物车
     */
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        shoppingCart.setCreateTime(LocalDateTime.now());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list != null && list.size() > 0) {
            shoppingCart = list.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber() + 1);
            shoppingCartMapper.updateNumberById(shoppingCart);
            return;
        }
        Long dishId = shoppingCartDTO.getDishId();
        Long setmealId = shoppingCartDTO.getSetmealId();
        if (dishId != null) {
            Dish dish = dishMapper.getById(dishId);
            shoppingCart.setName(dish.getName());
            shoppingCart.setImage(dish.getImage());
            shoppingCart.setDishFlavor(shoppingCartDTO.getDishFlavor());
            shoppingCart.setAmount(dish.getPrice());
            shoppingCart.setNumber(1);
        } else if (setmealId != null) {
            Setmeal setmeal = setmealMapper.getById(setmealId);
            shoppingCart.setName(setmeal.getName());
            shoppingCart.setImage(setmeal.getImage());
            shoppingCart.setAmount(setmeal.getPrice());
            shoppingCart.setNumber(1);
        }
        shoppingCartMapper.insert(shoppingCart);
    }

    /**
     * 查看购物车
     */
    @Override
    public List<ShoppingCart> showShoppingCarts() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder().userId(userId).build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    /**
     * 清空购物车
     */
    @Override
    public void clean() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder().userId(userId).build();
        shoppingCartMapper.delete(shoppingCart);
    }

    /**
     * 删除购物车中的商品
     */
    @Override
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        Long userId = BaseContext.getCurrentId();
        Long dishId = shoppingCartDTO.getDishId();
        Long setmealId = shoppingCartDTO.getSetmealId();
        ShoppingCart shoppingCart = ShoppingCart.builder().userId(userId).build();
        if (dishId != null) {
            shoppingCart.setDishId(dishId);
            shoppingCart.setDishFlavor(shoppingCartDTO.getDishFlavor());
        } else if (setmealId != null) {
            shoppingCart.setSetmealId(setmealId);
        }
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list != null && list.size() >= 0) {
            shoppingCart = list.get(0);
            if (shoppingCart.getNumber() > 1) {
                shoppingCart.setNumber(shoppingCart.getNumber() - 1);
                shoppingCartMapper.updateNumberById(shoppingCart);
            } else {
                shoppingCartMapper.delete(shoppingCart);
            }
        }
    }

}
